31. In Superbowl XXXVII, Michael Pittman of Tampa Bay rushed (ran with the football) 17 times on...

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31. In Superbowl XXXVII, Michael Pittman of Tampa Bay rushed (ran with the football) 17 times on rst down, and the results were the following gains in yards:

23 1 4 1 6 5 9 6 2

1 3 2 0 2 24 1 1

a. Determine the value of the sample mean.

b. Determine the value of the sample median. Why is it so different from the mean?

c. Calculate a trimmed mean by deleting the smallest and largest observations. What is the corresponding trimming percentage? How does the x

x  119.8 value of this compare to the mean and median?

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